[go: up one dir, main page]

GB739393A - Improvements in television apparatus - Google Patents

Improvements in television apparatus

Info

Publication number
GB739393A
GB739393A GB15370/53A GB1537053A GB739393A GB 739393 A GB739393 A GB 739393A GB 15370/53 A GB15370/53 A GB 15370/53A GB 1537053 A GB1537053 A GB 1537053A GB 739393 A GB739393 A GB 739393A
Authority
GB
United Kingdom
Prior art keywords
signal
pulse
pulses
line
counter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB15370/53A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zenith Electronics LLC
Original Assignee
Zenith Radio Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zenith Radio Corp filed Critical Zenith Radio Corp
Publication of GB739393A publication Critical patent/GB739393A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
GB15370/53A 1952-06-04 1953-06-03 Improvements in television apparatus Expired GB739393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US291714A US2883449A (en) 1952-06-04 1952-06-04 Subscription television system

Publications (1)

Publication Number Publication Date
GB739393A true GB739393A (en) 1955-10-26

Family

ID=23121510

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15370/53A Expired GB739393A (en) 1952-06-04 1953-06-03 Improvements in television apparatus

Country Status (7)

Country Link
US (2) US2883449A (ro)
BE (1) BE520453A (ro)
CH (1) CH332355A (ro)
DE (1) DE1054486B (ro)
FR (1) FR1106670A (ro)
GB (1) GB739393A (ro)
NL (2) NL112410C (ro)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029308A (en) * 1958-09-22 1962-04-10 Zenith Radio Corp Subscription television system
US2995624A (en) * 1959-03-11 1961-08-08 Zenith Radio Corp Secrecy communication system
US2987574A (en) * 1959-04-30 1961-06-06 Itt System for synchronizing a pulse with a carrier wave
US3478166A (en) * 1963-09-09 1969-11-11 Intern Telemeter Corp Cryptographic subscription television system with grey sync and dual mode augmenting signals

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547598A (en) * 1947-09-13 1951-04-03 Zenith Radio Corp Subscription image transmission system and apparatus
US2610295A (en) * 1947-10-30 1952-09-09 Bell Telephone Labor Inc Pulse code modulation communication system
IT454079A (ro) * 1948-07-02
US2656407A (en) * 1949-02-12 1953-10-20 Zenith Radio Corp Subscriber signaling system
US2694103A (en) * 1950-06-16 1954-11-09 Zenith Radio Corp Subscription television transmitter video-signal blanking stage
US2623941A (en) * 1950-06-23 1952-12-30 Zenith Radio Corp Subscription television system
US2757226A (en) * 1950-10-23 1956-07-31 Rca Corp Secret television systems

Also Published As

Publication number Publication date
NL178869B (nl)
NL112410C (ro) 1966-02-15
DE1054486B (de) 1959-04-09
USRE25836E (en) 1965-08-10
FR1106670A (fr) 1955-12-21
US2883449A (en) 1959-04-21
CH332355A (de) 1958-08-31
BE520453A (ro) 1955-06-24

Similar Documents

Publication Publication Date Title
US4130833A (en) Pay television system
US2547598A (en) Subscription image transmission system and apparatus
US4035838A (en) Cable distribution system for wide-band message signals
US2258943A (en) Synchronizing signal generator
US3904823A (en) Circuit arrangement for generating a control signal for the field output stage in a television receiver
US4319273A (en) Television signal with encoded synchronizing signals
US3478166A (en) Cryptographic subscription television system with grey sync and dual mode augmenting signals
US3814855A (en) Synchronizing signal producing system for a television device
US3878336A (en) Digital synchronizing system
US2212558A (en) Signaling system
US2540167A (en) Synchronizing system
US3882392A (en) Hotel-motel pay TV system
GB739393A (en) Improvements in television apparatus
US4319276A (en) Television receiver synchronizing arrangement
GB749573A (en) Synchronising arrangement, particularly for television apparatus
US3462551A (en) Channel synchronizer for multiplex pulse communication receiver
US3081377A (en) Secrecy communication
US4589017A (en) Pay television receiving system
US2614210A (en) Pulsed radio signaling
US3179935A (en) Random frequency radar system
US3689688A (en) Communications secrecy system
US2690471A (en) Color television system
US2566764A (en) Circuit for shifting alternate fields of television rasters
US3671669A (en) Recovery of horizontal sync pulses from a composite synchronizing format
US2889399A (en) Single frame facsimile system